I am in the Dog Lovers Group on LinkedIn. The owner of a dog named Chai has put out a plea to owners of dogs to take away the Four Paws Pimple Balls even though this may be their dog's favorite toy.

The pimple ball does not have a second hole in it, and so when a dog plays with it a vacuum is created. Poor Chai's tongue was sucked into the vacuum and the ball essentially cut the circulation off to his tongue. The dog was in terrible pain and eventually his tongue had to be amputated.

Here is a link to the blog about Chai. Scroll down past all the comments to see the original post and the images.